<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title">账户管理系统</h3>
      </div>

      <el-form-item prop="用户账号">
        <span class="svg-container">
          <svg-icon icon-class="user"/>
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="用户账号"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="用户密码">
        <span class="svg-container">
          <svg-icon icon-class="password"/>
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="用户密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon
            :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"
          />
        </span>
      </el-form-item>
      <el-form-item v-show="radio==='1'" prop="图形验证码">
        <div style="display: flex">
          <span class="svg-container">
            <i class="el-icon-circle-check"/>
          </span>
          <el-input
            ref="username"
            v-model="loginForm.validateCode"
            placeholder="验证码"
            name="validateCode"
            type="text"
            tabindex="3"
            auto-complete="on"
          />
          <el-image
            style="margin-left: 5px;"
            :src="`data:image/jpg;base64,${base64}`"
            @click="generateValidateCode"
          />
        </div>
      </el-form-item>
      <el-form-item v-show="radio==='2'" prop="邮箱地址">
       <span class="svg-container">
          <i class="el-icon-s-promotion"/>
        </span>
        <el-input
          ref="email"
          v-model="email"
          placeholder="邮箱地址"
          name="email"
          type="text"
          tabindex="3"
          auto-complete="on"
        />
      </el-form-item>
      <el-form-item v-show="radio==='2'" prop="邮箱验证码">
        <div style="display: flex">
          <span class="svg-container">
            <i class="el-icon-circle-check"/>
          </span>
          <el-input
            v-model="loginForm.validateCode"
            placeholder="验证码"
            name="validateCode"
            type="text"
            tabindex="4"
            auto-complete="on"
          />
          <el-button
            :disabled="disabled"
            style="margin-left: 10px;"
            type="primary"
            size="medium"
            @click="sendEmailValidateCode"
          >{{ sendBtn }}
          </el-button>
        </div>
      </el-form-item>
      <div style="text-align: right;margin-bottom: 15px">
        <el-radio v-model="radio" label="1">图形验证码</el-radio>
        <el-radio v-model="radio" label="2">邮箱验证码</el-radio>
      </div>
      <el-button
        :loading="loading"
        type="primary"
        style="width: 100%;"
        @click.native.prevent="handleLogin"
      >登录
      </el-button>
      <div style="text-align: right"><el-link :underline="false" href="/#/forgetPassword">忘记密码</el-link></div>
      <!--      <div class="tips">-->
      <!--        <span style="margin-right: 20px"> 管理员账号: admin</span>-->
      <!--        <span style="margin-right: 20px">学生账号: 学号</span>-->
      <!--        <span> 密码: 123456</span>-->
      <!--      </div>-->
    </el-form>
  </div>
</template>

<script>
import {validUsername} from '@/utils/validate'
import {generateValidateCode, sendEmailValidateCode} from '@/api/user'
import {v4 as uuidv4} from 'uuid'

export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (validUsername(value)) {
        callback(new Error('Please enter the correct user name'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('The password can not be less than 6 digits'))
      } else {
        callback()
      }
    }
    return {
      sendBtn: '发送验证码',
      disabled: false,
      radio: '1',
      email: '',
      loginForm: {
        username: '',
        password: '',
        validateCodeId: '',
        validateCode: ''
      },
      base64: '',
      loginRules: {
        username: [
          {required: true, trigger: 'blur', validator: validateUsername}
        ],
        password: [
          {required: true, trigger: 'blur', validator: validatePassword}
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.generateValidateCode()
  },
  methods: {
    sendEmailValidateCode() {
      if (!(/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,})$/.test(this.email))) {
        this.$message.error('邮箱有误，请检查后再发送。')
        return
      }
      sendEmailValidateCode({
        validateCodeId: this.loginForm.validateCodeId,
        targetEmail: this.email
      }).then(res => {
        this.$message.success('邮箱验证码已发送。')
      }).catch(err => {
        console.log(err)
      })
      let time = 30
      const timer = setInterval(() => {
        this.disabled = true
        this.sendBtn = time + '秒重新发送'
        time--
        if (time === 0) {
          this.disabled = false
          this.sendBtn = '发送验证码'
          window.clearInterval(timer)
        }
      }, 1000)
    },
    generateValidateCode() {
      this.loginForm.validateCodeId = uuidv4()
      generateValidateCode(this.loginForm.validateCodeId).then(res => {
        this.base64 = res.result
      }).catch(err => {
        console.log(err)
      })
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate((valid) => {
        if (valid) {
          this.loading = true
          // 分发登录
          this.$store
            .dispatch('user/login', this.loginForm)
            .then(() => {
              this.$router.push({path: '/index'})
              this.loading = false
              // console.log(this.$store.getters.permission);
            })
            .catch(() => {
              this.loading = false
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;
  background: url("https://w.wallhaven.cc/full/4o/wallhaven-4ogdo5.jpg") no-repeat 4px 5px;
  background-size: 100% 100%;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
